the first version of c backend

backend-c/sdk/logger.c

@@ -0,0 +1,15 @@
+#include "logger.h"
+
+#define __LOGGER_IMPORT(name) \
+    __attribute__((__import_module__("logger"), __import_name__(#name)))
+
+void __write(char ch) __LOGGER_IMPORT(write);
+void __flush() __LOGGER_IMPORT(flush);
+
+void wasm_log(const char *str, int len) {
+    for(int byteId = 0; byteId < len; ++byteId) {
+        __write(str[byteId]);
+    }
+
+    __flush();
+}